Police have swarmed a children's hospital in Memphis as what appears to be a serious incident unfolds.
Images from the scene show a heavy police presence outside St. Jude Children's Research Hospital in the Tennessee city on the evening of Tuesday, July 21.
US news outlets have also reported 'multiple streets have been blocked and taped off' by various law enforcement agencies.
They include Memphis Police Department and Memphis Safe Task Force, Fox13 reports.
The cause of the police presence remains unconfirmed.
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